Method of forming containers



July 7, 1942. H. A. FINK METHOD OF FORMING CONTAINERS 2 Sheets-Shet l Filed July 17, 1941 July 7, 1942. H. A. FlNK METHOD OF FORMING CONTAINERS Filed July 1'7, 1941 2 Sheets-Sheet 2 Patented July 7, 1942 2,288,896 METHOD or FORMING CONTAINERS Henry A. Fink, Pelham Manor, N. Y., assignor to Continental Can Company, Inc., New York, N. Y., a corporation of New York Application July 17, 1941, Serial No. 402,823

Claims. (01. 93-393 The invention relates generally to the art of manufacturing containers and primarily seeks to provide a novel method of forming containers having laminated paper wall structures and metallic end closures.

In the use of containers having laminated paper wall structures and end closures in the packaging of liquids, and especially oils, problems are presented by the oil or other liquids seeping into the interstices between the end closures and the end portions of the container, and also into the wall laminae. This objectionable seepage is known to the trade as wicking or weeping. It is the purpose of the present invention to provide a novel method of forming container structures of the character stated in a manner which will prevent this wicking or weeping" of the contained oil or otherliquid in the finished containers.

In its more detailed nature the method resides in forming laminated paper walled container bodies, in applying a tacky oil-proof sealing compound between the wall laminae at the end portions only of the container body, and in applying and crimping metallic end closures on the body ends in a manner for compressing the body end portions and the intervening sealing compound and thereby sealing said end wall portions against wicking or weeping.

Another object of the invention is to provide a method of the character stated including the step of applying metallic end closures which include securing flange or channel portions to which have been applied a tacky oil-proof sealing compound, and in crimping or otherwise securing said end closures in place in a manner for compressing the container body end portions and the tacky oil-proof sealing compound intervening laminae of said end portions so as to cause said intervening sealing compound to be partially extruded from the wall laminae into intimate union with the sealing compound in the end closure channels.

Another object of the invention is to "provide a method of the character stated including the steps of forming an elongated tubular body having laminated walls and having a length which is a multiple of the length of container bodies ultimately to be formed, applying between the laminae during the formation of the tubular body narrow stripes of a tacky oil-proof sealing compound, one such stripe being applied so as to be disposed at each end of the body and one at each individual body length distance interl3 from a reservoir I l.

mediately of said ends, and then severing the tubular body into individual container body lengths by cutting the tubular body through transversely and centrally of each intermediate sealing compound stripe.

Withthe above and other objects in view which will more fully appear, the nature of the invention will be more clearly understood by following the description, the appended claims, and the several views illustrated in the accompanying drawings.

In the drawings:

Figure 1 is a side elevation diagrammatically illustrating the method of forming the laminated walled, tubular container.

Figure 2 is a vertical cross section taken on the line 2-2 on Figure 1.

Figure 3 is a vertical cross section taken on the line 3-3 on Figure 1.

Figure 4 is a perspective view illustrating a fragment of a composite web striped with a tacky oil-proof sealing compound. Y

Figure 5 is aperspective view'illustrating one of the multiple length tubular bodies before it is severed into individual container body lengths.

Figure 6 is a side elevation and part longitudinal sectional view of an individual container body.

Figure 7 is a fragmentary sectional view illustrating one of the metallic end closures.

Figure 8 is a fragmentary sectional view'illustrating the end closure applied to a container body unit of the nature illustrated in Figure 6, the end closure being shown in the applied condition but not crimped or ultimately set.

Figure 9 is a view similar to Figure 8 illustrating the crimped or ultimately set condition of the end closure.

In the diagrammatic illustration of one manner of carrying out the invention included in the drawings, there is embodied a web roll 5 and a web roll 6, an upper web I being drawn off from the roll 5 and a lower web 8 being drawn oil from the roll 6. The upper and lower webs 1 and 8 pass under adhesive applying brushes 9 onto which adhesive may be fed through drip pipes Hi from a reservoir H. The adhesive will serve ultimately to unite the upper and lower webs into a single composite Web.

The upper and lower weLs also pass under a plurality of longitudinal spray nozzles l2 fed with a'tacky oil-proof sealing compound of any approved type, such as Darex, through manifolds The nozzles H are spaced across the webs in the manner illustrated in Figure 3 so as to deposit on the webs narrow angle bent edge portion 21.

stripes ii of the sealing compound as indicated in Figure 4.

'The webs l and 8 are of a width which is a multiple of the intended length of container bodies ultimately to be formed, and it will be observed by reference to Figure 4 that the stripes ii of the oil-proof sealing compound are deposited/ one along each extreme lateral edge of each web and one intermediately of said web at widths equivalent to the length of the container bodies ultimately to be formed. The brushes 9 serve to provide an over-all surface coating of an adhesive on the webs and this coating is indicated at H5 in Figure l. It will be obvious that if the composite web illustrated in Figure 4. be longitudinally slit along the dotted lines ll, three indl vidual webs each of a width equivalent to the length of a container body ultimately to be formed will be provided.

The composite web may be slit longitudinally, as at ii, and then rolled convolutely to form individual container bodies, or the full width composite web can be first rolled and then out into individual container body lengths. It will also be obvious that instead of forming the container structures from a convolutely rolled composite web comprising adhered webs l and 8, these container bodies may be rolled up from a single web l or 8.

' In the diagrammatic illustration in Figure l the individual webs are brought together to form a composite web, and this web is severed transversely into suitable lengths for being rolled up convolutely into multiple container lengths by a suitable cutofi knife diagrammatically indicated at H3. The web is rolled about a mandrelilB and after each body roll is completed, a-labe'l 2|] is rolled thereabout to complete the body wall structure. A multiple length body roll structure thus formed is indicated at 2i in Figure 5, the lines at which the multiple length stock is to be transversely cut in order to form individual container body lengths being indicated at 22. It is to be understood that these out lines are disposed centrally of intermediate sealing compound stripes between the wall stock laminae, and by thus severing the multiple tube stock into individual body lengths, individual body lengths are formed each having tacky oil-proof sealing compound between the wall laminae through about one-half inch of length at each end thereof.

If desired, the multiple length tubular body canbe severed into individual lengths by a reciprocably mounted cutting element diagrammatically indicated at 23 while the multiple length tubular stock 2! is still on the mandrel. It is to be understocd, however, that this cutting up of the tube may be accomplished. after the stock is removed from the mandrel if desired.

The individual containers are completed by applying metallic end closures thereto. An acceptable form of end closure is illustrated in Fi ures 'I, 8 and 9, but it is to be understood that the invention is not limited to any particular form of end closure but comprehends the use of any form of end closure which will serve to compress end wall portions of the tube body stock. in the manner hereinafter described. The particular end closure illustrated includes a body portion 24,

a heel 25 insertible into the ends of the laminated walled paper body, and an outwardly extended body end engaging flange 26 terminating in an The under surface of the flange 26 and the outer surface of the heel aeessee 25 are coated with a tacky oil-proof compound as indicated at 28.

After the cover has been applied to an end of the container body in the manner illustrated in Figure 8, it is shaped to form a body end portion embracing skirt 29 which together with the heel 25 and the normal flange portion 26 forms a channel embracing the end of the laminated paper container body in the manner illustrated in Figure 8. This figure illustrates the cover as applied but not crimped or finally set on the con= tainer body end portion.

In Figure 9 of the drawings the crimped or finally set condition of an end closure is illustrated, and when the end closures are thus finally set, pressure is applied thereto so as to tightly compress the laminated end wall portion of the container body in the channel and indent the closure edge portion as indicated at 36. This application of pressure causes the tacky oilproof sealing compound which extends approximately one-half inch from each end extremity of the container body between the paper laminae in the manner illustrated at 38 in Figures 6 and 8 to be partially extruded or forced'endwise in the manner indicated at 32 in Figure 9, thereby to engage and form an intimate union with the sealing compound 28 of the end closure, thus to assure against so-called weeping or wicking of oil or other liquids into and through the interstices in the end closure seal.

While this disclosure'- as diagrammatically illustrated discloses one manner of practicing the method, it is to be understood that various forms of apparatus may be employed for this purpose. Apparatus for convolutely rolling the tube stock and severing the same into body lengths are well known, and an example of such mechanism is to be found in the U. S. Letters Patent to Sousa, et al., No. 2,163,318, issued June 20, 1939. Reference is also made herein to crimping on ofthe metallic end closure, but it is to be understood that any form 'of attachment of these end closures capable of exerting the sealing compound extruding pressure hereinbefore referred to will be found practical, as by the formation of a rolledor so-called false seam.

I claim:

1. The method of forming laminated paper walled container bodies which comprises the steps of applying a tacky oil-proof sealing compound between the wall laminae at the end portiJns only of a container body, and applying and crimping annularly channeled metallic end 010- sures on the body ends with said ends in the closure channels thereby to compress the end portions and the intervening tacky sealing compound and seal the wall end portions against wicking.

2. The method of forming laminated paper walled container bodies which comprises the steps of applying a tacky oil-proof sealing compound between the wall laminae at the end portions only of a container body, and applying and crimping onto the body ends metallic end closures having body end embracing channels thereon coated with a tacky oil-proof sealing compound, thereby to compress said end portions and the intervening tacky sealing compound and cause said intervening tacky sealing compound to be partially extruded from said wall laminae into intimate union with the sealing compound in the end closurechannels.

3. In a method of forming laminated paper walled container bodies, the steps of forming an elongated tubular body having laminated walls and of a length suflicient to enable formation therefrom of a plurality of container bodies, applying between the laminae during the formation of the tubular body narrow stripes of a tacky oil-proof sealing compound one at each end and one at each individual body length distance intermediately of said ends of said tubular body, and severing said tubular body into individual container body lengths by cutting said tubular body through transversely and centrally of each intermediate sealing compound stripe.

4. The method of forming laminated paper walled container bodies which comprises, forming an elongated tubular body having laminated walls and of a length suflicient to enable formation therefrom of a plurality of container bodies, applying between the laminae during the formation of the tubular body narrow stripes of a tacky oilproof sealing compound one at each end and one at each individual body length distance intermediately of said ends of said tubular body, severing said tubular body into individual container body lengths by cutting said tubular body through transversely and centrally of each intermediate sealing compound stripe, and applying and crimping metallic end closures on the ends of each said severed individual container body length to compress the end portions of said lengths and the intervening sealing compound and thereby seal the wall end portions of said severed lengths against wicking.

5. The method of forming laminated paperintermediately of said ends of said tubular body,

severing said tubular body into individual container body lengths by cutting said tubular body through transversely and centrally of each intermediate sealing compound stripe, and applying and crimping onto the ends of said severed individual body lengths metallic end closures having body end embracing channels thereon coated with a tacky oil-proof sealing compound, thereby to compress body length ends and the intervening sealing compound and cause said intervening sealing compound to be partially extruded from said body length end wall laminae into intimate union with the sealing compound in the end closure channels.

, HENRY A. FINK. 

